OverviewA trolling line consists of a line with natural or artificial baited hooks and is trailed by a vessel near the surface or at a certain depth. Several lines are often towed at the same time, by using outriggers to keep the lines away from the wake of the vessel. The line are hauled by hand or with small winches. A piece of rubber is often included in each line as a shock absorber.Handling EquipmentHauling trolling lines might be mechanized. Outriggers (made from wood or metal) should be light and reasonably flexible.Vessel OverviewTrollers.Fish OperationA number of lures or baited hooks are towed astern at a speed depending on the target species, from 2.3 knots up to at least 7, the fish being hooked after snapping at the lure and held by the mouth until they can be brought aboard as the line is hauled in.Target SpeciesSmall fish (e.g. mackerel) and big pelagic fish as tuna.Water Area OverviewAll over the world.Gear EnvironmentTrolling lines are towed near the surface, or a certain distance below it. They are employed in marine and in freshwater fishing.ImpactsSpecies Non-targeted fish is seldom captured; it is a very selective fishing method.